Stars Compared
Stars come in many sizes and colours, as this diagram for my
Illustrated Atlas of the
Universe shows. On the bottom right are Arcturus (orange giant), Rigel (blue giant), Sirius
A (blue dwarf) and the Sun (yellow dwarf). Meanwhile on the left at the top the Sun is shown blown
up and compared with Proxima Centauri (a red dwarf) and Sirius B (a white dwarf).